Association between BTEX (benzene, toluene, ethylbenzene and xylene) concentration in ambient air with hematological and spirometric indices: a population-based study

Hosna Moradkhani, M. Leili, Jalal Puralajal, Ashraf Mazaheri Tehrani, A. Hossein Panahi, Mohammd Taghi Samadi, Sara Beheshtifar
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Abstract

Abstract The study aimed to evaluated the relationship between BTEX (benzene, toluene, ethyl benzene and xylene) concentrations in the ambient air with human biomarkers in Assaluyeh city, Iran. According to the results, the average benzene concentration in the high pollution city was measured at 30.05 µg/m3, which is higher than the value recommended (0.03 mg/m3) by the U.S. Environmental Protection Agency (U.S. EPA). The mean spirometric parameters of the resident population in two high and low pollution areas were forced vital capacity (FVC) (high = 4.52; low = 4.78 L), forced expiratory volume in 1 second (FEV1) (high = 3.52; low = 3.88 L), FEV1/FVC (high = 77.9; low = 82.08%), peak expiratory flow (PEF) (high = 9.76; low = 27.85 L/min), and forced inspiratory flow 25–75% (FEF25-75) (high = 3.17; low = 3.95 L/s). Besides, no statistically significant difference was observed between the two groups by comparison of blood tests and the mean concentration of BTEX. BTEX concentration was measured at zero in low pollution areas due to lack of traffic and industries, but it was higher than the respiratory air standard and in the high-pollution area due to the being close to gas and petrochemical stations and industries in the surrounding. As a result, prolonged exposure to higher concentrations of BTEX increases the risks of respiratory dysfunction.
环境空气中BTEX(苯、甲苯、乙苯和二甲苯)浓度与血液学和肺活量测定指标之间的关系:一项基于人群的研究
摘要本研究旨在评估伊朗阿萨卢耶市环境空气中苯、甲苯、乙苯和二甲苯浓度与人体生物标志物的关系。结果显示,高污染城市的苯平均浓度为30.05µg/m3,高于美国环保署(U.S. EPA)推荐值(0.03 mg/m3)。两个高、低污染区常住人口的平均肺活量参数为:强迫肺活量(FVC),高值= 4.52;低= 4.78 L), 1秒用力呼气量(FEV1)(高= 3.52;低= 3.88 L), FEV1/FVC(高= 77.9;低= 82.08%),呼气流量峰(PEF)(高= 9.76;低= 27.85 L/min),强迫吸气流量25-75% (FEF25-75)(高= 3.17;low = 3.95 L/s)。此外,两组患者血液检查结果及BTEX平均浓度比较,差异无统计学意义。低污染地区由于缺乏交通和工业,BTEX浓度为零,而高污染地区由于靠近周围的天然气和石化站和工业,BTEX浓度高于呼吸空气标准。因此,长期接触高浓度BTEX会增加呼吸功能障碍的风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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